私はlocalhostでサーバーを初期化し、同じマシン上のローカルサーバーに接続されているクライアントの起動と停止を含む数千のストレステストを実行するテストコレクションを持っています。クライアントがサーバーにRSTを送信する理由を見つけようとしています。
一連のイベントは次のとおりです。
- クライアント初期化 SYN
- サーバーはSYNとACKを再送信します。
- クライアントはACKの代わりにRSTを送信し、接続を確立します。
1つの観察は、サーバーのCPUが数秒/分以内に正常に戻っても約99％で実行されることが多いことです。
最初は、クライアントがTIME_WAIT状態にあった以前に閉じた接続のポートを使用していたため、これが発生する可能性があると思いました。したがって、サーバーがSYNを送信したとき、クライアントはその接続に対してRST ACKを発行しました。クライアントがTIME_WAIT状態のポートを使用する理由は懐疑的でしたが、以前のFedora Core 4を使用していましたが、正しいTCP / IP実装がない可能性があると思いました。 :-).
これで、上記の問題を解決するために行われたすべての調整が問題を軽減するために何もしないため、これが原因であるとは考えません。ちなみに、私が試した変更は次のとおりです/etc/sysctl.conf。
net.ipv4.ip_local_port_range = 1024 65535
net.ipv4.tcp_fin_timeout = 15
net.ipv4.tcp_rfc1337 = 1
net.ipv4.tcp_tw_reuse = 1
もう一つ、この質問は一貫性がありません。実際、サーバーを再起動してすべてのクライアントテストを15〜35サイクル実行した後にこの問題を再現できました。
なぜこのようなことが起こることができるのかについて、私が考えることができるすべての理由を使い果たしました。何が起こるのかという考えがある人がいる場合は、教えてください。
パケットの詳細
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:45.378209 1032719 1858.494749 ::1 ::1 TCP 94 netview-aix-5 navisphere netview-aix-5 > navisphere [SYN] Seq=0 Win=32752 Len=0 MSS=16376 SACK_PERM=1 TSval=1587252 TSecr=0 WS=128
Frame 1032719: 94 bytes on wire (752 bits), 94 bytes captured (752 bits)
Arrival Time: Jun 25, 2014 14:49:45.378209000 EDT
Epoch Time: 1403722185.378209000 seconds
[Time delta from previous captured frame: 0.005893000 seconds]
[Time delta from previous displayed frame: 0.000000000 seconds]
[Time since reference or first frame: 1858.494749000 seconds]
Frame Number: 1032719
Frame Length: 94 bytes (752 bits)
Capture Length: 94 bytes (752 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: TCP SYN/FIN]
[Coloring Rule String: tcp.flags & 0x02 || tcp.flags.fin == 1]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 40
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: netview-aix-5 (1665), Dst Port: navisphere (2162), Seq: 0, Len: 0
Source port: netview-aix-5 (1665)
Destination port: navisphere (2162)
[Stream index: 3374]
Sequence number: 0 (relative sequence number)
Header length: 40 bytes
Flags: 0x02 (SYN)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...0 .... = Acknowledgement: Not set
.... .... 0... = Push: Not set
.... .... .0.. = Reset: Not set
.... .... ..1. = Syn: Set
[Expert Info (Chat/Sequence): Connection establish request (SYN): server port navisphere]
.... .... ...0 = Fin: Not set
Window size value: 32752
[Calculated window size: 32752]
Checksum: 0xf489 [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Options: (20 bytes)
Maximum segment size: 16376 bytes
TCP SACK Permitted Option: True
Timestamps: TSval 1587252, TSecr 0
No-Operation (NOP)
Window scale: 7 (multiply by 128)
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:45.378222 1032720 1858.494762 ::1 ::1 TCP 94 navisphere netview-aix-5 navisphere > netview-aix-5 [SYN, ACK] Seq=0 Ack=1 Win=32728 Len=0 MSS=16376 SACK_PERM=1 TSval=1587252 TSecr=1587252 WS=128
Frame 1032720: 94 bytes on wire (752 bits), 94 bytes captured (752 bits)
Arrival Time: Jun 25, 2014 14:49:45.378222000 EDT
Epoch Time: 1403722185.378222000 seconds
[Time delta from previous captured frame: 0.000013000 seconds]
[Time delta from previous displayed frame: 0.000013000 seconds]
[Time since reference or first frame: 1858.494762000 seconds]
Frame Number: 1032720
Frame Length: 94 bytes (752 bits)
Capture Length: 94 bytes (752 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: TCP SYN/FIN]
[Coloring Rule String: tcp.flags & 0x02 || tcp.flags.fin == 1]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 40
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: navisphere (2162), Dst Port: netview-aix-5 (1665), Seq: 0, Ack: 1, Len: 0
Source port: navisphere (2162)
Destination port: netview-aix-5 (1665)
[Stream index: 3374]
Sequence number: 0 (relative sequence number)
Acknowledgement number: 1 (relative ack number)
Header length: 40 bytes
Flags: 0x12 (SYN, ACK)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...1 .... = Acknowledgement: Set
.... .... 0... = Push: Not set
.... .... .0.. = Reset: Not set
.... .... ..1. = Syn: Set
[Expert Info (Chat/Sequence): Connection establish acknowledge (SYN+ACK): server port navisphere]
.... .... ...0 = Fin: Not set
Window size value: 32728
[Calculated window size: 32728]
Checksum: 0xf7fa [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Options: (20 bytes)
Maximum segment size: 16376 bytes
TCP SACK Permitted Option: True
Timestamps: TSval 1587252, TSecr 1587252
No-Operation (NOP)
Window scale: 7 (multiply by 128)
[SEQ/ACK analysis]
[This is an ACK to the segment in frame: 1032719]
[The RTT to ACK the segment was: 0.000013000 seconds]
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:45.378228 1032721 1858.494768 ::1 ::1 TCP 74 netview-aix-5 navisphere netview-aix-5 > navisphere [RST] Seq=1 Win=0 Len=0
Frame 1032721: 74 bytes on wire (592 bits), 74 bytes captured (592 bits)
Arrival Time: Jun 25, 2014 14:49:45.378228000 EDT
Epoch Time: 1403722185.378228000 seconds
[Time delta from previous captured frame: 0.000006000 seconds]
[Time delta from previous displayed frame: 0.000006000 seconds]
[Time since reference or first frame: 1858.494768000 seconds]
Frame Number: 1032721
Frame Length: 74 bytes (592 bits)
Capture Length: 74 bytes (592 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: TCP RST]
[Coloring Rule String: tcp.flags.reset eq 1]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 20
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: netview-aix-5 (1665), Dst Port: navisphere (2162), Seq: 1, Len: 0
Source port: netview-aix-5 (1665)
Destination port: navisphere (2162)
[Stream index: 3374]
Sequence number: 1 (relative sequence number)
Header length: 20 bytes
Flags: 0x04 (RST)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...0 .... = Acknowledgement: Not set
.... .... 0... = Push: Not set
.... .... .1.. = Reset: Set
[Expert Info (Chat/Sequence): Connection reset (RST)]
.... .... ..0. = Syn: Not set
.... .... ...0 = Fin: Not set
Window size value: 0
[Calculated window size: 0]
[Window size scaling factor: 128]
Checksum: 0x4eea [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:48.375927 1032722 1861.492467 ::1 ::1 TCP 94 netview-aix-5 navisphere netview-aix-5 > navisphere [SYN] Seq=0 Win=32752 Len=0 MSS=16376 SACK_PERM=1 TSval=1588002 TSecr=0 WS=128
Frame 1032722: 94 bytes on wire (752 bits), 94 bytes captured (752 bits)
Arrival Time: Jun 25, 2014 14:49:48.375927000 EDT
Epoch Time: 1403722188.375927000 seconds
[Time delta from previous captured frame: 2.997699000 seconds]
[Time delta from previous displayed frame: 2.997699000 seconds]
[Time since reference or first frame: 1861.492467000 seconds]
Frame Number: 1032722
Frame Length: 94 bytes (752 bits)
Capture Length: 94 bytes (752 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: TCP SYN/FIN]
[Coloring Rule String: tcp.flags & 0x02 || tcp.flags.fin == 1]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 40
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: netview-aix-5 (1665), Dst Port: navisphere (2162), Seq: 0, Len: 0
Source port: netview-aix-5 (1665)
Destination port: navisphere (2162)
[Stream index: 3374]
Sequence number: 0 (relative sequence number)
Header length: 40 bytes
Flags: 0x02 (SYN)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...0 .... = Acknowledgement: Not set
.... .... 0... = Push: Not set
.... .... .0.. = Reset: Not set
.... .... ..1. = Syn: Set
[Expert Info (Chat/Sequence): Connection establish request (SYN): server port navisphere]
.... .... ...0 = Fin: Not set
Window size value: 32752
[Calculated window size: 32752]
Checksum: 0xf19b [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Options: (20 bytes)
Maximum segment size: 16376 bytes
TCP SACK Permitted Option: True
Timestamps: TSval 1588002, TSecr 0
No-Operation (NOP)
Window scale: 7 (multiply by 128)
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:48.375950 1032723 1861.492490 ::1 ::1 TCP 94 navisphere netview-aix-5 [TCP Previous segment lost] navisphere > netview-aix-5 [SYN, ACK] Seq=2997725 Ack=1 Win=32728 Len=0 MSS=16376 SACK_PERM=1 TSval=1588002 TSecr=1588002 WS=128
Frame 1032723: 94 bytes on wire (752 bits), 94 bytes captured (752 bits)
Arrival Time: Jun 25, 2014 14:49:48.375950000 EDT
Epoch Time: 1403722188.375950000 seconds
[Time delta from previous captured frame: 0.000023000 seconds]
[Time delta from previous displayed frame: 0.000023000 seconds]
[Time since reference or first frame: 1861.492490000 seconds]
Frame Number: 1032723
Frame Length: 94 bytes (752 bits)
Capture Length: 94 bytes (752 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: Bad TCP]
[Coloring Rule String: tcp.analysis.flags]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 40
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: navisphere (2162), Dst Port: netview-aix-5 (1665), Seq: 2997725, Ack: 1, Len: 0
Source port: navisphere (2162)
Destination port: netview-aix-5 (1665)
[Stream index: 3374]
Sequence number: 2997725 (relative sequence number)
Acknowledgement number: 1 (relative ack number)
Header length: 40 bytes
Flags: 0x12 (SYN, ACK)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...1 .... = Acknowledgement: Set
.... .... 0... = Push: Not set
.... .... .0.. = Reset: Not set
.... .... ..1. = Syn: Set
[Expert Info (Chat/Sequence): Connection establish acknowledge (SYN+ACK): server port navisphere]
.... .... ...0 = Fin: Not set
Window size value: 32728
[Calculated window size: 32728]
Checksum: 0x3414 [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Options: (20 bytes)
Maximum segment size: 16376 bytes
TCP SACK Permitted Option: True
Timestamps: TSval 1588002, TSecr 1588002
No-Operation (NOP)
Window scale: 7 (multiply by 128)
[SEQ/ACK analysis]
[This is an ACK to the segment in frame: 1032722]
[The RTT to ACK the segment was: 0.000023000 seconds]
[TCP Analysis Flags]
[A segment before this frame was lost]
[Expert Info (Warn/Sequence): Previous segment lost (common at capture start)]
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:48.375958 1032724 1861.492498 ::1 ::1 TCP 74 netview-aix-5 navisphere netview-aix-5 > navisphere [RST] Seq=1 Win=0 Len=0
Frame 1032724: 74 bytes on wire (592 bits), 74 bytes captured (592 bits)
Arrival Time: Jun 25, 2014 14:49:48.375958000 EDT
Epoch Time: 1403722188.375958000 seconds
[Time delta from previous captured frame: 0.000008000 seconds]
[Time delta from previous displayed frame: 0.000008000 seconds]
[Time since reference or first frame: 1861.492498000 seconds]
Frame Number: 1032724
Frame Length: 74 bytes (592 bits)
Capture Length: 74 bytes (592 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: TCP RST]
[Coloring Rule String: tcp.flags.reset eq 1]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 20
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: netview-aix-5 (1665), Dst Port: navisphere (2162), Seq: 1, Len: 0
Source port: netview-aix-5 (1665)
Destination port: navisphere (2162)
[Stream index: 3374]
Sequence number: 1 (relative sequence number)
Header length: 20 bytes
Flags: 0x04 (RST)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...0 .... = Acknowledgement: Not set
.... .... 0... = Push: Not set
.... .... .1.. = Reset: Set
[Expert Info (Chat/Sequence): Connection reset (RST)]
.... .... ..0. = Syn: Not set
.... .... ...0 = Fin: Not set
Window size value: 0
[Calculated window size: 0]
[Window size scaling factor: 128]
Checksum: 0x4eea [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:54.376072 1032725 1867.492612 ::1 ::1 TCP 94 netview-aix-5 navisphere netview-aix-5 > navisphere [SYN] Seq=0 Win=32752 Len=0 MSS=16376 SACK_PERM=1 TSval=1589502 TSecr=0 WS=128
Frame 1032725: 94 bytes on wire (752 bits), 94 bytes captured (752 bits)
Arrival Time: Jun 25, 2014 14:49:54.376072000 EDT
Epoch Time: 1403722194.376072000 seconds
[Time delta from previous captured frame: 6.000114000 seconds]
[Time delta from previous displayed frame: 6.000114000 seconds]
[Time since reference or first frame: 1867.492612000 seconds]
Frame Number: 1032725
Frame Length: 94 bytes (752 bits)
Capture Length: 94 bytes (752 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: TCP SYN/FIN]
[Coloring Rule String: tcp.flags & 0x02 || tcp.flags.fin == 1]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 40
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: netview-aix-5 (1665), Dst Port: navisphere (2162), Seq: 0, Len: 0
Source port: netview-aix-5 (1665)
Destination port: navisphere (2162)
[Stream index: 3374]
Sequence number: 0 (relative sequence number)
Header length: 40 bytes
Flags: 0x02 (SYN)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...0 .... = Acknowledgement: Not set
.... .... 0... = Push: Not set
.... .... .0.. = Reset: Not set
.... .... ..1. = Syn: Set
[Expert Info (Chat/Sequence): Connection establish request (SYN): server port navisphere]
.... .... ...0 = Fin: Not set
Window size value: 32752
[Calculated window size: 32752]
Checksum: 0xebbf [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Options: (20 bytes)
Maximum segment size: 16376 bytes
TCP SACK Permitted Option: True
Timestamps: TSval 1589502, TSecr 0
No-Operation (NOP)
Window scale: 7 (multiply by 128)
iptables-save出力：
# Generated by iptables-save v1.3.0 on Thu Jun 26 10:15:33 2014
*filter
:FORWARD ACCEPT [0:0]
:INPUT ACCEPT [675:236200]
:OUTPUT ACCEPT [241:21540]
COMMIT
# Completed on Thu Jun 26 10:15:33 2014
ベストアンサー1
Fedora 4 TCPスタック実装内にあると推測される根本原因を修正せずに採用されたソリューションでこのスレッドを終了したかったのです。解決策として、ETIMEDOUTが原因でエラーが発生し、使用されたプロトコルがIPV6の場合はすぐに再接続を試みました。これで私のチームの問題は完全に解決されましたが、他の接続の問題がある間にエラーを報告すると、さらに3分の遅延が発生し、ETIMEDOUTが発生します。これは問題に対する実際/理想的な解決策ではありませんが、続行します。これは、自動化されたテストスイートにのみ影響し、顧客に出荷されないためです。私は結局、Fedora 4 tcp / ipスタックの実装について十分に知っている人がこの謎を永遠に解放できることを願っています。